APA
E. De Clercq, . (1990). Antiviral Research. Amsterdam: Elsevier science publishers.
Chicago
E. De Clercq, . 1990. Antiviral Research. Amsterdam: Elsevier science publishers.
Harvard
E. De Clercq, . (1990). Antiviral Research. Amsterdam: Elsevier science publishers.
MLA
E. De Clercq, . Antiviral Research. Amsterdam: Elsevier science publishers. 1990.